Copy 3 files(install-recovery.sh, reboot-recovery.sh, recovery.img) to the root of /sdcard directory
1. Install Superuser.apk included in the zip file. Open SuperUser app, you need to update it's binary in Preferences. (note: Need Internet connection)
2. Install Terminal Emulator app on your Android device "Android.-.Better.Terminal.Pro.v3.05.apk" included in the zip file.
3. Open "Better Terminal Pro app" to run the scripts.
Terminal Emulator/console: Press "Enter" after each line below
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$ su
#sh /sdcard/install-recovery.sh
#sh /sdcard/reboot-recovery.sh
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Once you run the second script, system will boot into recovery. Use the three hard keys to move up/down/back. Press 'power' button to select. Then you could proceed in installing CM9 zip files